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- // Copyright 2020 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- package gasprice
- import (
- "context"
- "math"
- "math/big"
- "testing"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/consensus/ethash"
- "github.com/ethereum/go-ethereum/core"
- "github.com/ethereum/go-ethereum/core/rawdb"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/core/vm"
- "github.com/ethereum/go-ethereum/crypto"
- "github.com/ethereum/go-ethereum/params"
- "github.com/ethereum/go-ethereum/rpc"
- )
- type testBackend struct {
- chain *core.BlockChain
- }
- func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
- if number == rpc.LatestBlockNumber {
- return b.chain.CurrentBlock().Header(), nil
- }
- return b.chain.GetHeaderByNumber(uint64(number)), nil
- }
- func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
- if number == rpc.LatestBlockNumber {
- return b.chain.CurrentBlock(), nil
- }
- return b.chain.GetBlockByNumber(uint64(number)), nil
- }
- func (b *testBackend) ChainConfig() *params.ChainConfig {
- return b.chain.Config()
- }
- func newTestBackend(t *testing.T) *testBackend {
- var (
- key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
- addr = crypto.PubkeyToAddress(key.PublicKey)
- gspec = &core.Genesis{
- Config: params.TestChainConfig,
- Alloc: core.GenesisAlloc{addr: {Balance: big.NewInt(math.MaxInt64)}},
- }
- signer = types.LatestSigner(gspec.Config)
- )
- engine := ethash.NewFaker()
- db := rawdb.NewMemoryDatabase()
- genesis, _ := gspec.Commit(db)
- // Generate testing blocks
- blocks, _ := core.GenerateChain(params.TestChainConfig, genesis, engine, db, 32, func(i int, b *core.BlockGen) {
- b.SetCoinbase(common.Address{1})
- tx, err := types.SignTx(types.NewTransaction(b.TxNonce(addr), common.HexToAddress("deadbeef"), big.NewInt(100), 21000, big.NewInt(int64(i+1)*params.GWei), nil), signer, key)
- if err != nil {
- t.Fatalf("failed to create tx: %v", err)
- }
- b.AddTx(tx)
- })
- // Construct testing chain
- diskdb := rawdb.NewMemoryDatabase()
- gspec.Commit(diskdb)
- chain, err := core.NewBlockChain(diskdb, nil, params.TestChainConfig, engine, vm.Config{}, nil, nil, nil)
- if err != nil {
- t.Fatalf("Failed to create local chain, %v", err)
- }
- chain.InsertChain(blocks)
- return &testBackend{chain: chain}
- }
- func (b *testBackend) CurrentHeader() *types.Header {
- return b.chain.CurrentHeader()
- }
- func (b *testBackend) GetBlockByNumber(number uint64) *types.Block {
- return b.chain.GetBlockByNumber(number)
- }
- func TestSuggestPrice(t *testing.T) {
- config := Config{
- Blocks: 3,
- Percentile: 60,
- Default: big.NewInt(params.GWei),
- }
- backend := newTestBackend(t)
- oracle := NewOracle(backend, config)
- // The gas price sampled is: 32G, 31G, 30G, 29G, 28G, 27G
- got, err := oracle.SuggestPrice(context.Background())
- if err != nil {
- t.Fatalf("Failed to retrieve recommended gas price: %v", err)
- }
- expect := big.NewInt(params.GWei * int64(30))
- if got.Cmp(expect) != 0 {
- t.Fatalf("Gas price mismatch, want %d, got %d", expect, got)
- }
- }
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